Awesome report. It looks quite big from the pictures![]()
The tunnel down from Main West is about 12ft wide, the main vent duct is about 25ft wide and 15ft high, the fans are about 8-12ft diameter. There was a battery room about the size of a single garage which I didn't get a piccy of which had shelves of 10-gallon size glass batteries for the emergency lights. At one point a group I was involved with were looking at doing a sponsored walk and it was suggested doing it down the mine. I worked out that covering all the passages you could walk about 10 miles!
So, yes it is a bit big!